To learn more about local produce, here are some great resources to check out: 

http://www.localharvest.org/

http://www.eatwellguide.org

http://www.foodroutes.org/

http://www.cooperativegrocer.coop/coops/

http://www.nal.usda.gov/afsic/pubs/csa/csa.shtml

If you live anywhere in the Philadelphia, PA area, learn more about local farms at:

http://www.farmtocity.org/

Anyone near or in Chester County, PA has this great resource available:

http://www.chesco.org/agriculture/farmmarkets